Ensure Wall Outlets Have Appropriate Cable Security
Wall outlets for SECRET and TOP SECRET should only have cables that match these classifications.
Plain language
This control focuses on making sure that the cables connected to wall outlets designated for SECRET and TOP SECRET information match the sensitivity level of those areas. This matters because using less secure cables in these outlets could lead to data leaks or unauthorised access, putting very sensitive information at risk.
Framework
ASD Information Security Manual (ISM)
Control effect
Preventative
Classifications
S, TS
ISM last updated
Feb 2023
Control Stack last updated
19 Mar 2026
E8 maturity levels
N/A
Section
Cabling infrastructureTopic
Wall Outlet BoxesOfficial control statement
SECRET and TOP SECRET wall outlet boxes contain exclusively SECRET or TOP SECRET cables.
Why it matters
Improper cable security at SECRET/TOP SECRET wall outlets can enable interception or unauthorised access to classified traffic, risking national security.
Operational notes
Inspect wall outlet boxes to confirm only SECRET/TOP SECRET-rated cables are present, and remove/replace any mismatched cable runs promptly.
Implementation tips
- The IT manager should identify all wall outlets in areas where SECRET and TOP SECRET information is handled. They can do this by walking through each section, checking building plans, and noting locations.
- The procurement officer should ensure that only cables designed for SECRET and TOP SECRET use are purchased for these wall outlets. They can achieve this by checking supplier catalogs and matching product specifications with security requirements.
- Technicians need to install the cables in SECRET and TOP SECRET outlets, ensuring that each cable's classification matches the outlet's classification. They can do this by following a checklist that verifies cable specifications before installation.
- The facility manager should label all SECRET and TOP SECRET wall outlets to prevent accidental misuse. This can be done with clear and permanent signs or tags directly on or near the outlets.
- HR should organise training for staff on the importance of using the correct cables in these designated outlets. They can arrange for short informational sessions that cover possible risks and correct behaviours.
Audit / evidence tips
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Askthe building's cabling inventory records: Request a list of cables used in SECRET and TOP SECRET areas
Goodshows cables labelled specifically for SECRET and TOP SECRET use only
-
Goodshows consistent purchasing of correctly classified cables
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Askdemonstration of labelling on wall outlets: Visit areas with SECRET and TOP SECRET outlets to see the physical labels. Verify that labelling is visible and matches what is indicated in the documentation
Goodconfirms all outlets are correctly labelled in the field
-
Goodincludes regular audit intervals with correct outcomes
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Askattendance records from training sessions: Request documentation showing who has attended training on this control. Check if all relevant staff members were present and if refreshers are scheduled
Goodshows comprehensive coverage and retention activities
Cross-framework mappings
How ISM-1105 relates to controls across ISO/IEC 27001, Essential Eight, and ASD ISM.
ISO 27001
| Control | Notes | Details |
|---|---|---|
| layers Partially meets (1) expand_less | ||
| Annex A 7.2 | ISM-1105 requires that wall outlet boxes used for SECRET and TOP SECRET contain only cables of the same classification, preventing cross-... | |
These mappings show relationships between controls across frameworks. They do not imply full equivalence or certification.